SAN MATEO — A man accused of snatching a 9-year-old girl from a San Mateo school restroom last month faces additional charges after authorities tied him to a March incident where he allegedly photographed a group of 9-year-old girls from underneath a school restroom stall in Daly City.

Bradley Mrozek, a 25-year-old San Francisco resident, is already in a San Mateo County jail cell on felony kidnapping and child molestation charges. Prosecutors have added felony counts of burglary and attempted possession of child pornography along with misdemeanor counts of child annoyance and disorderly conduct involving loitering at a restroom.

The Daly City incident surfaced last week but reportedly occurred the afternoon of March 16 at Washington Elementary, according to San Mateo County District Attorney Stephen Wagstaffe. According to police, a strange man hid in a girls bathroom stall and took pictures of four 9-year-old girls by reaching underneath the stall.

A teacher was alerted and entered the restroom and demanded that the man exit the stall. After initially refusing, the man burst through the door and quickly ran away.

He would not be identified as Mrozek until Sept. 26, after Washington administrators saw news reports about his arrest in a Sept. 21 kidnapping at Parkside Elementary.

According to police, Mrozek snuck up on a 9-year-old girl washing her hands in a Parkside restroom, groped her below the waist, and covered her mouth with his hand as he carried her off campus. The two traveled a couple of blocks toward a house but she kicked her way free and threw rocks at him and scrambled back to the school.

Authorities also allege that earlier the same day, Mrozek harassed two girls at STEM Academy, asking one of the teens if she was a virgin. He also offered the girls some vodka. They didn’t drink any alcohol, but two boys took sips, prosecutors say. Mrozek has been charged with misdemeanors based on the allegations.

The news prompted the Washington school principal to contact Daly City police, and the teacher involved in the restroom confrontation in March identified Mrozek as the man who took photos of the girls in the restroom.

“She immediately picked our (suspect),” Wagstaffe said.

Prosecutors have not publicly released Mrozek’s photo, citing the sensitivity of the investigation.

Wagstaffe said Mrozek was not quickly identified in the March case because he was not a registered sex offender, which would have made his photo readily available to investigators. The district attorney says he plans to change that.

Robert Salonga covers crime and public safety for the Bay Area News Group and is based at The Mercury News. A San Jose native, he has a bachelor's degree from UCLA and a Master's degree in journalism from the University of Maryland-College Park, but remains a Bruin at heart. His prior reporting stops include Washington, D.C. and Salinas. He is also a middling triathlete whose sole race goal is to be upright at the end. Contact Robert at 408-920-5002.